Donald Trump and Vladimir Putin hold talks in Alaska on Friday, with the U.S. president's hopes of sealing a ceasefire agreement on Ukraine uncertain but with a last gasp offer from Putin of a possible nuclear deal that could help both men save face.

U.S. President Donald Trump is meeting face-to-face with Russian President Vladimir Putin in Alaska on Friday for a high-stakes summit that could determine not only the trajectory of the war in Ukraine but also the fate of European security.